3D sketch curves (wires): Include 3D Geometry keeps out-of-plane edges and curves 3D; Project To Surface (curves onto a face along the sketch normal), Intersection Curve (bodies/faces), Isoparametric Curve (u/v or a direction), Spun Profile (a body's outline about an axis) and Fit Curves to Mesh Section; all linked and re-resolved; wires drawn, inspected and deletable

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/doc/src/lib.rs

@@ -11,6 +11,7 @@ mod eval;
 pub mod expr;
 mod params;
 pub mod project;
+mod project3d;
 
 pub use assembly::{IDENTITY, Mat, Occurrence, apply_point, apply_vector, is_identity, mat_inverse, mat_mul, rigid};
 pub use document::*;